メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.282430611763 43.1029251423136, 141.280797785621 43.1039511433646, 141.27922890973 43.1049052944696, 141.278688151834 43.1044553878453, 141.277840825837 43.1038909846153, 141.279564280796 43.1028174788931, 141.281211827361 43.1018069513636, 141.282430611763 43.1029251423136)) ^^http://www.opengis.net/ont/geosparql#wktLiteral